AWS Claude Sonnet 4.5 - Box Dev Docs

According to Anthropic, the AWS Claude Sonnet 4.5 model is a high-performance model designed for building complex agents, delivering leading coding capabilities, and executing across development tasks. It excels at autonomously planning and executing complex, multi-step workflows and is particularly effective in areas like finance, research, and cybersecurity.

Model details

Item	Value	Description
Model name	AWS Claude Sonnet 4.5	The name of the model.
Model category	Premium	The category of the model: Standard or Premium.
API model name	`aws__claude_4_5_sonnet`	The name of the model that is used in the . The user must provide this exact name for the API to work.
Compliance	ISMAP, FedRAMP Moderate	Government compliance frameworks and authorizations applicable to this model.
Hosting layer	Amazon Web Services (AWS)	The trusted organization that securely hosts the LLM.
Model provider	Anthropic	The organization that provides this model.
Release date	September 29th, 2025	The release date for the model.
Knowledge cutoff date	January 2025	The date after which the model does not get any information updates.
Input context window	200k tokens	The number of tokens supported by the input context window.
Maximum output tokens	64k tokens	The number of tokens that can be generated by the model in a single request.
Empirical throughput	Not specified	The number of tokens the model can generate per second.
Open source	No	Specifies if the model’s code is available for public use.

Additional documentation

For additional information, see official AWS Claude Sonnet 4.5 documentation.

Last modified on May 27, 2026

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